• en
  • pt-br

All publications of “Gustavo Spadotti Amaral Castro”

5 results

Rhizobial Inoculation and Molybdenum Fertilization in Peanut Crops Grown in a No Tillage System After 20 Years of Pasture

Carlos Alexandre Costa Crusciol, Jayme Ferrari Neto, Tsai Siu Mui, Alan Joseph Franzluebbers, Cláudio Hideo Martins da Costa, Gustavo Spadotti Amaral Castro, [...]

07/Jan/2019

ABSTRACT: Peanut (Arachis hypogea) is an important legume grain consumed by humans and utilized for effective nutrient cycling in a diverse cropping system. Areas that have been cultivated with perennial pasture for decades may have nutritional deficiencies and lack a sufficient population of atmospheric nitrogen-fixing bacteria. Molybdenum is an essential micronutrient that is part of the enzyme nitrogenase contained within symbiotic Bradyrhizobium bacteria, which are responsible for fixing nitrogen in legumes. Our objective was to evaluate the effects of application […]

Effect of potassium sources and rates on arabica coffee yield, nutrition, and macronutrient export

Mauricio Antonio Cuzato Mancuso, Rogério Peres Soratto, Carlos Alexandre Costa Crusciol, Gustavo Spadotti Amaral Castro

01/Oct/2014

The use of potassium (K) rock powder can be an alternative for K supply of crops. Thus, to reduce K fertilizer imports from abroad, possibilities of extracting this nutrient from Brazilian rocks are being studied. The objective was to evaluate the effect of phonolite rock powder (F2) as K source (Ekosil®) on the air-dried fruit yield, nutrition and macronutrient export of Arabica coffee. The experiment was carried out on a dystroferric Red Latosol (Typic Haplorthox), in Piraju, São Paulo State, […]

Leaf application of silicic acid to white oat and wheat

Rogério Peres Soratto, Carlos Alexandre Costa Crusciol, Gustavo Spadotti Amaral Castro, Claudio Hideo Martins da Costa, Jayme Ferrari Neto

01/Nov/2012

Silicon (Si) is beneficial to plants in several aspects, but there are doubts about the effectiveness of leaf application. The purpose of this work was to evaluate the effects of Si, applied in a newly developed stabilized silicic acid form to the leaf, on nutrition and yield of irrigated white oat and wheat. Two experiments were performed (one per crop) in winter 2008, in Botucatu-SP, Brazil. A completely randomized block design with 14 replications was used. Treatments consisted of a […]

Nitrate role in basic cation leaching under no-till

Carlos Alexandre Costa Crusciol, Rodrigo Arroyo Garcia, Gustavo Spadotti Amaral Castro, Ciro Antonio Rosolem

01/Dec/2011

Especially under no-tillage, subsuface soil acidity has been a problem, because it depends on base leaching, which has been associated with the presence of low molecular weigth organic acids and companion anions. The objective of this study was to evaluate exchangeable base cation leaching as affected by surface liming along with annual urea side-dressing of maize and upland rice. Treatments consisted of four lime rates (0, 1500, 3000, and 6000 kg ha-1) combined with four nitrogen rates (0, 50, 100, […]

Water-soluble nutrients in aerial plant parts of peanut and white oat as affected by lime and gypsum application

Rúbia Renata Marques, Carlos Alexandre Costa Crusciol, Gustavo Spadotti Amaral Castro, Lucas Perim

01/Apr/2011

Lime and gypsum influence nutrient availability and uptake, as well as the content of organic acids in the aerial plant parts. These changes, quantified by plant analysis of soluble nutrients, may potentiate the effect of soil amendment, ensuring the sustainability of the no-tillage system. In this sense the effect of lime and gypsum surface application on the content of water-soluble nutrients in peanut and oat residues was evaluated. The experiment was conducted on an Oxisol in Botucatu (SP) in the […]